4 AUGUST 2010 EXTENDED FORECAST
THUNDERSTORMS SHOULD REDEVELOP LATER TODAY ESPECIALLY SOUTH OF INTERSTATE 80 AS THE COLD FRONT PUSHES SOUTH INTO NRN MO............ SHOWERS/THUNDERSTORMS WILL RETURN AT TIMES THIS WEEKEND...AND AGAIN MONDAY NIGHT AND TUESDAY.
A COOL FRONT EXTENDS FROM SOUTHERN LAKE MICHIGAN...AND ACROSS CENTRAL IOWA AND INTO NORTHERN MISSOURI. THE SURFACE LOW PRESSURE SYSTEM WILL SLIDE NORTHEAST ALONG THE FRONTAL BOUNDARY TODAY...AND TRACK INTO SOUTHERN IOWA LATER TONIGHT. HIGH PRESSURE WILL BUILD INTO THE UPPER MIDWEST THURSDAY AND FRIDAY.
HIGH PRESSURE BUILDING INTO THE AREA THURSDAY WILL BRING DRY WEATHER ON THURSDAY AND FRIDAY. THE DRIER WEATHER WILL HOLD UNTIL SATURDAY OR SATURDAY NIGHT - WHEN ANOTHER LOW PRESSURE SYSTEM SWEEPS SOUTHWARD OUT OF CANADA - GIVING US ANOTHER SHOT AT PRECIP.........
TODAY 4TH - SHOWERS/STORMS WILL WILL PERSIST THRU EARLY EVENING - THEN PARTLY CLOUDY - TEMP 85
THURSDAY AND FRIDAY 5TH/6TH - PARTLY CLOUDY - TEMPS MID 80'S
SATURDAY AND SUNDAY 7TH/8TH - ISOLATED SHOWERS/STORMS LATE SATURDAY LASTING INTO SUNDAY MORNING - THEN PARTLY CLOUDY - TEMP NEAR 90
RAIN-RAIN GO AWAY?????
THE HIGH PRESSURE SYSTEM THAT HAS DOMINATED THE SOUTHEAST UNITED STATES APPEARS TO BE MAKING A SHIFT NORTHWARD.....OVER THE PAST 2 WEEKS, HIGH PRESSURE CENTERED OVER THE SOUTHEAST U.S. HAS FORCED THE DOMINATE WEATHER PATTERNS TO MOVE WEST TO EAST ACROSS THE NORTHERN PLAINS - GIVING US ABOVE SEASONAL TEMPS, HIGH HUMIDITIES, AND RECORD RAINFALLS.
HIGH PRESSURE WILL REESTABLISH ITSELF UP THE EAST COAST AND CENTER OVER EASTERN CANADA. THIS WILL FORCE LOW LEVEL FLOW OVER THE NORTHERN PLAINS AND MIDWEST TO SHIFT TO A MORE EASTERLY PATTERN - HISTORICALLY, THIS IS A DRYER PATTERN FOR IOWA...THAT'S NOT TO SAY WE WON'T SEE ANY RAIN AS LONG AS HIGH PRESSURE IS TO OUR EAST. HOWEVER, WE WILL BE MUCH DRYER THAN THE PAST WEEKS, AND TEMPS AND HUMIDITIES WILL BE MORE SEASONAL......
MONDAY AND TUESDAY 9TH/10TH - MONDAY AFTERNOON SHOWERS/STORMS LASTING INTO TUESDAY - TEMPS NEAR 90
WED THRU FRIDAY 11TH THRU 13TH - PARTLY CLOUDY
SATURDAY 14TH - INCREASING CLOUDS WITH SHOWERS/STORMS
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